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Multiple dipole receiving (Rx) coils, which are applicable to ubiquitous mobile device charging applications, are newly proposed in this paper. By using the proposed Rx coils, any mobile devices equipped with the proposed Rx coil can be freely charged regardless of direction anywhere and at any time in wireless power zone, where a uniformly distributed magnetic flux environment is provided for wireless...
On-silicon coupled inductors with integrated magnetic material offer improved voltage regulator performance particularly in high power density applications such as microprocessor power delivery. The on-silicon coupled inductor designs reported in literature typically use single layer metal for winding deposition. In this paper we report on design, optimization and fabrication of two on-silicon coupled...
This paper proposes a non-linear observer for Induction Machine (IM) drives which takes into consideration the saturation effects. The non-linear observer is based on an original formulation of the dynamic model of the IM taking into consideration the magnetic saturation of the iron core. A Lyapunov based convergence analysis is proposed in order to suitably compute the observer gain guaranteeing...
In order to reduce energy consumption, we have developed a technique that quickly reverses salient poles in permanent magnet (PM) motors. When this proposed technique is used, because of this permanent magnetization, PM motors can change negative salient poles to positive salient poles. This paper proposes a novel PM motor that uses our proposed technique to reverse saliency and describes the principle...
The design of power magnetic components for operation at high frequency (HF, 3–30 MHz) has been hindered by a lack of performance data and by the limited design theory in that frequency range. To address these deficiencies, we have measured and present core loss data for a variety of commercially available magnetic materials in the HF range. In addition, we extend the theory of performance factor...
While high frequency switching of power converters can enable inductor volume reductions, large temperature increases occur in such inductors as their thermal resistance increases. Therefore, the ability to accurately calculate inductor iron losses is necessary when designing high-power-density converters. In the present paper, the authors propose an accurate iron loss calculation method for inductors...
This paper proposes Series Input Parallel Output (SIPO) interleaved Active Clump Forward (ACF) converter with novel integrated magnetic components that may achieve high power density. The proposed converter consists of two ACF converters in SIPO connection to share the input voltage and output current. The natural magnetizing reset can be realized by the active clump circuit. The SIPO connection distributes...
This paper presents a input-output Feedback Linearization (FL) control technique for rotating Induction Motors (IM), which takes into consideration the magnetic saturation of the iron core. Starting from a new formulation of the IM dynamic model, taking into consideration the magnetic saturation, expressed in a space-state form in the rotor flux oriented reference frame, the corresponding FL technique...
This paper presents a newly developed high torque density motor design for electric racing cars. An interior permanent magnet motor with a flux-concentration configuration is proposed. The 18slots/16poles motor has pre-formed tooth wound coils, rare-earth magnets type material, whilst employing a highly efficient cooling system with forced oil convection through the slot and forced air convection...
Flyback switch mode power supplies have been widely used in low-power applications, such as DC/DC converters, solar micro-inverters and LED drivers. However, flyback converters have several problems related to the volume of the output capacitor as well as high output voltage noise; this is produced by the discontinuous output current. Consequently, interleaved operation with parallel connection on...
The Modular Multilevel Converter (M2LC) is a well-known modular multilevel topology. This paper proposes a novel branch inductor coupling and compares it to the center-tapped inductor and the standard non-coupled inductor topology. The proposed coupling has a significant influence on the inductor and converter dimensioning. Its properties make it especially well-suited for use in M2LC single-to-three-phase...
The demand of high power Continuous Conduction Mode (CCM) Power Factor Correction (PFC) converter installed in charging devices for Electric and Hybrid Vehicles has grown in the recent years. In these converters, the inductor often appears as the largest component, consequently, the CCM boost PFC converter using coupled inductors is well-known as one of the topologies that can achieve miniaturization...
Passive components such as inductors and capacitors are fundamental components of nearly all power electronic conversion systems. This paper presents an innovative approach to highly integrated inductor (L) and capacitor (C) design by storing magnetic and electric field energy in a common volume, constituting a dual energy core (DEC). This is dissimilar from other integrated designs that primarily...
This paper suggests design of variable flux motor for variable speed operation. The calculation method of electrical parameters to meet variable speed condition is suggested, and the basic motor shape is decided using the relationships between the calculated electrical parameters and motor geometry. The difference between corecivity of two types of magnet is used to control flux. To prevent irreversible...
High torque density and low torque ripple are crucial for traction applications. These allow the electrified powertrains to perform properly during start-up, acceleration, and cruising. Achieving these goals requires improvement to the saliency of the rotor geometry which means higher magnetization in the flux carriers and lower magnetization through the flux barriers. Recent advantages of high quality...
This paper presents the design and implementation of a 27.12 MHz, 320 W, 170 V to 28 V dc-dc resonant power converter with resonant inductors and capacitors embedded into the Printed Circuit Board (PCB). Operating at 27.12 MHz allows for small value and size resonant passive components to be implemented using traces on or within a PCB. Previous work [1]-[14] has demonstrated various ways of using...
The task of applying numerical design optimization techniques to traction motors increases in complexity when there are complicated combinations of demanding performance specifications and physical dimension constraints that must be satisfied. This paper presents a constrained optimization routine that can be used to efficiently optimize electric machine designs to meet demanding U.S. DRIVE traction...
In this paper a novel E-Core axial flux machine is proposed. The machine has a double stator-single rotor configuration with flux concentrating ferrite magnets, and pole windings across each leg of an E-Core stator. E-Core stators with the proposed flux-concentrating rotor arrangement result in better magnet utilization and higher torque density. The machine also has a modular structure facilitating...
This paper investigates the impact of three transformer-winding configurations, i.e. the Y-Y, the Y-Δ, and the Δ-Δ configuration, on the performance of a three-phase dual active bridge (DAB) dc-dc converter. For each configuration, equations for the phase current, power flow, and soft-switching boundaries are derived for all possible switching modes of the three-phase DAB. Thereafter, a comparison...
Transmitting and receiving resonators for 7 kW-class wireless power transfer/transmission (WPT) systems operating at 85 kHz have been developed for contactless Electric Vehicle (EV) / Plugin Hybrid EV (PHEV) charging. The light weight and small volume of the on-board receiving resonator to be mounted on the vehicle are required attributes. A thickness and a shape of the core in the resonance coil...
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